To clear up the machine gun question, before I get to the real purpose of the post, the FOPA of 1986 banned the sale or manufacture of machine guns not legally owned before the date of the act, 1986. This means there is a very limited pool of used guns, which is shrinking each year. The average price of one the last time I looked was around $20K, and rising. More exclusive models range all the way up to $50K. Oh, and there's the $200 to the government and a third of the states ban them outright and all the others, including this one, has a list of "prohibited persons." Been dishonorably discharged? Forget it.
I haven't read the thread all that closely, but I don't remember any emphasis being placed on Harris' 105 days to campaign as an unelected candidate. Her own bid for the presidency died in a whimper. That tells me that, if Biden had done the right, promised, thing and announced a year ago that he was not going to run, there would have been an open primary competition and another candidate would have been projected forward and it wouldn't have been Harris, that's for sure. One factor I haven't seen mentioned is the antipathy between the black community and people associated with law enforcement. She was a two-time AG of California and, in the Senate, came across as a prosecutor, which is what she was before being elected to statewide office. That came up repeatedly in her own prior bid, in addition to her far left positions from 2019. Given the short time to campaign and overcoming both inflation and her negatives were too much. She was forced onto an "anyone but Trump" position, plus a few goodies. As a consequence, she underperformed Biden by around 13 million. Meanwhile, Trump barely dropped - maybe 2 million, when all votes are finally counted. In addition, a new candidate would not have been tied to the vastly unpopular Biden-Harris administration. When all is considered, it's really a surprise she did as well as she did.
Underlying all this is of course the tectonic shift in what the Republican Party has/is becoming. The question at this point is really what the Democratic Party will become. You guys will get to see the outcome. At my age, I probably won't get to see the total shift. Let's just hope we still recognize our country at the end of four years, if an election occurs then...